Audio delivery system having an improved efficiency and extended operation time between recharges or battery replacements

摘要

Embodiments of the disclosure may include a method and apparatus for improving the efficiency and extending the operation time between recharges or replacement batteries of a portable audio delivery system. The audio delivery system may include a processor, an audio processing device, a speaker, and a rechargeable power source. The audio delivery system is generally configured to generate and/or receive an audio input signal and efficiently deliver an amplified, high quality audio output signal to a user. In some embodiments of the disclosure, the audio processing device of the audio delivery system may include a switch mode power supply (SMPS), a signal delay element, an envelope detector, and a switching signal amplifier.

主权项

1. An audio device, comprising:
a signal delay element configured to receive an input signal that includes audio signal data and produce a delayed input signal that includes the audio signal data after a predetermined lag time has elapsed; a switching signal amplifier configured to produce an output signal having an output voltage based on the delayed input signal and a gain of the switching signal amplifier; an envelope detector configured to receive the input signal and produce a power instruction signal based on at least one characteristic of the input signal; a power supply providing a battery voltage; and a switch mode power supply configured to provide a variable rail voltage to the switching signal amplifier for generation of the output signal, wherein the variable rail voltage is based on the battery voltage and the power instruction signal received from the envelope detector.